Modular Aircraft simulation platform based on Simulink

Aircraft simulation platform is the most important supporting technology in the aircraft development process. This simulation platform can be used for validating the design of subsystem and also it provides the necessary data for the Aircraft design. Wind has great impact on the flight parameter. In order to accurately simulate the wind model and calculate the flight parameters, a simulation modeling method for flight parameter simulation platform under wind field environment is established. Firstly, the various sub-systems which affecting flight parameters are analyzed, some mathematical models of the flight parameter simulation platform is established. Secondly, the atmospheric wind field is studied to analyze the impact on its trajectory. Then the model is built in the Simulink toolbox in the Matlab which is based on the principles of hierarchy and modularity, using C MEX S-function for the complex kinetic equations. Finally, when the models have been established, encapsulating models for several subsystem and assembling them for the Aircraft simulation platform based on the unified interface. The simulation tests (including the performance test of a certain gliding Aircraft, the wind influence test of a certain uncontrolled aircraft) prove the simulation capability of the platform, and its calculating step can reach 1 ms. Comparing simulation with field test data of a certain uncontrolled aircraft, it shows that the relative deviation of range is 0.47%, the relative deviation of maximal altitude is 2.1%. Taking relevant standards as a reference standard, it is demonstrated the platform is reliable, meets the engineering accuracy requirements.